In last month’s article, we began to rediscover non-electric thermostatic radiator valves (TRV). In this month’s article, we complete that examination. It is a “set it and forget it” type of thermostat, and the final setting is dependent upon all of the usual variables associated with determining final degrees of comfort. Are the occupants heavily clothed or lightly clothed; are they active or are they inactive; and what is their proximity to large areas of glazing. ...

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